THE REPRODUCTIVE SYSTEM OF E. SUPERBA 



337 



inner lobe (Fig. 13). Growth of the median lobe proceeds more rapidly than that of 

 the inner lobe, but the terminal process pt of the latter is now so long that it reaches 

 almost to the top of the median lobe (Fig. 14). The proximal process pp now begins 

 to broaden at its tip (Fig. 14) and finally shows a leaf-like expansion, while one or 

 two small hooks /)a develop on the end of the median lobe (Fig. 15). 



Fig. II. Fig. 12. Fig. 13. 



Fig. 11-13. First pleopod. Development of the petasma. x 30. /'/, inner lobe; ml, middle lobe; 

 pi, lateral process; pp, proximal process; pt, terminal process; w, wing. 



The adult condition has now been reached. This has been fully described by D. D. 

 John (1936) in his paper on " The southern species of the genus Euphatisia ", and he has 

 kindly allowed me to quote his description and to reproduce one of his figures. 



When the mature petasma is unrolled (Figs. 16 a and b) it can be seen that the 

 "proximal part of the terminal process pt is bent nearly at a right angle to the distal 

 part, which is about three times as long.. . .The end of the process tapers and curls 

 forwards; it is not bifid. The distal two-fifths of the proximal process/"/) is bent inwards 



